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【结 构 式】

【分子编号】57617

【品名】3-[(4aS,8R)-4,4a,5,6,7,8-hexahydro-3H-isochromen-8-yl]-1-(4-vinylphenyl)-1-propanone

【CA登记号】

【 分 子 式 】C20H24O2

【 分 子 量 】296.40936

【元素组成】C 81.04% H 8.16% O 10.8%

与该中间体有关的原料药合成路线共 1 条

合成路线1

该中间体在本合成路线中的序号:(VII)

Michael addition of acrylonitrile to the enamine resultant from cyclohexanone (I) and pyrrolidine, followed by alkylation with ethyl bromoacetate, leads to the cyano ester (II). Subsequent Wittig reaction of (II) with methoxymethylene triphenylphosphorane affords the enol ether (III). The ester group of (III) is then reduced to alcohol (IV) using L-selectride. Further intramolecular cyclization of (IV) under acidic conditions gives rise to the bicyclic compound (V). Lithiation of p-bromostyrene (VI) with tert-butyllithium, followed by addition to nitrile (V) produces the ketone adduct (VII). Photooxygenation of (VII), followed by cyclization in the presence of trimethylsilyl triflate, furnishes the fused trioxane derivative (VIII). Finally, oxidative cleavage of the vinyl group of (VIII) with potassium permanganate yields the target carboxylic acid.

1 Paik, I.-H.; Posner, G.H.; Jeon, H.B.; Shapiro, T.A.; Xie, S.; Borstnik, K.; Ploypradith, P.; Orally active, water-soluble antimalarial 3-aryltrioxanes: Short synthesis and preclinical efficacy testing in rodents. J Med Chem 2002, 45, 18, 3824.
中间体序号 中间体编号 品名 CAS号 分子式 供应商 用于合成
(IIIa) 57612 ethyl 2-{3-(2-cyanoethyl)-2-[(Z)-methoxymethylidene]cyclohexyl}acetate C15H23NO3 详情 详情
(IIIb) 57613 ethyl 2-{3-(2-cyanoethyl)-2-[(E)-methoxymethylidene]cyclohexyl}acetate C15H23NO3 详情 详情
(IVa) 57614 3-{(1R,3S)-3-(2-hydroxyethyl)-2-[(Z)-methoxymethylidene]cyclohexyl}propanenitrile C13H21NO2 详情 详情
(IVb) 57615 3-{(1R,3S)-3-(2-hydroxyethyl)-2-[(E)-methoxymethylidene]cyclohexyl}propanenitrile C13H21NO2 详情 详情
(I) 11059 Cyclohexanone 108-94-1 C6H10O 详情 详情
(II) 57611 ethyl 2-[3-(2-cyanoethyl)-2-oxocyclohexyl]acetate C13H19NO3 详情 详情
(V) 57616 3-[(4aS,8R)-4,4a,5,6,7,8-hexahydro-3H-isochromen-8-yl]propanenitrile C12H17NO 详情 详情
(VI) 49237 4-Bromostyrene; p-Bromostyrene 2039-82-9 C8H7Br 详情 详情
(VII) 57617 3-[(4aS,8R)-4,4a,5,6,7,8-hexahydro-3H-isochromen-8-yl]-1-(4-vinylphenyl)-1-propanone C20H24O2 详情 详情
(VIII) 57618 (1S,4R,8S,12R,13R)-1-(4-vinylphenyl)-11,14,15,16-tetraoxatetracyclo[10.3.1.0~4,13~.0~8,13~]hexadecane C20H24O4 详情 详情
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